Have you ever created an awesome #PromQL query, but then get a “No data” response when you run it? If so, PromQL vector matching might be the culprit. In this blog post, a #Grafana community member explains what you need to know.
https://grafana.com/blog/2024/12/13/promql-vector-matching-what-it-is-and-how-it-affects-your-prometheus-queries
PromQL vector matching: what it is and how it affects your Prometheus queries | Grafana Labs
In this post, we take a closer look at the concept of vector matching in PromQL and why it's important for Prometheus users to understand.
Grafana Labs